20305400113 has 2 divisors, whose sum is σ = 20305400114. Its totient is φ = 20305400112.

The previous prime is 20305400053. The next prime is 20305400189. The reversal of 20305400113 is 31100450302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20139299569 + 166100544 = 141913^2 + 12888^2 .

It is a cyclic number.

It is not a de Polignac number, because 20305400113 - 2¹⁷ = 20305269041 is a prime.

It is not a weakly prime, because it can be changed into another prime (20305400513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10152700056 + 10152700057.

It is an arithmetic number, because the mean of its divisors is an integer number (10152700057).

Almost surely, 2^20305400113 is an apocalyptic number.

It is an amenable number.

20305400113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20305400113 is an equidigital number, since it uses as much as digits as its factorization.

20305400113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20305400113 its reverse (31100450302), we get a palindrome (51405850415).

The spelling of 20305400113 in words is "twenty billion, three hundred five million, four hundred thousand, one hundred thirteen".